- Making http post requests using okhttp
- getApplicationContext (Context)
- putExtra (Intent)
- addToBackStack (FragmentTransaction)
- FileOutputStream (java.io)
An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
- FileWriter (java.io)
A specialized Writer that writes to a file in the file system. All write
requests made by calling me
- Comparator (java.util)
A Comparator is used to compare two objects to determine their ordering with
respect to each other.
- Stream (java.util.stream)
A sequence of elements supporting sequential and parallel aggregate operations.
The following exampl
- Servlet (javax.servlet)
Defines methods that all servlets must implement. A servlet is a small Java
program that runs within
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
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